Architectural shingles
Metal roofing
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Replacement Across Ontario
Roof replacement in Ontario, CA typically runs between $9,800 and $24,000 for a standard single-family home, with most asphalt shingle teardowns landing in the $12,000 to $18,000 range. The spread depends on square footage, pitch, decking condition, and whether you choose architectural or premium shingle lines. We’re based right next door in Rancho Cucamonga, so our crews reach every Ontario neighborhood from the historic downtown core to the 91762 subdivisions north of the 10 without a long dispatch delay. Call (866) 538-0713 for a free, written replacement estimate, and we’ll walk the roof with you before you spend a dollar.
Key Takeaways:
- Full Roof Replacement in Ontario runs roughly $9,800 to $24,000; most homes fall between $12,000 and $18,000.
- Older Ontario tract homes often hide blocked soffit vents, skip sheathing, and split rafters under the old shingles, which is why inspection before tear-off matters so much here.
- Santa Ana winds and Inland Empire UV are the two biggest roof killers in this city, not rain or snow.
- We write decking and framing allowances into every Ontario contract so surprises get priced and approved in writing before we touch them.
Why Suncrest Roof Repair Is Ontario’s Preferred Roof Replacement Company
Homeowners across Ontario call us because we inspect before we prescribe, and we stock seven major shingle and material brands, GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, so the material recommendation fits your roof and your budget, not whatever happens to be sitting in the warehouse. When we walk an Ontario roof, we’re looking at how the home was built in the first place, because that determines what a replacement actually needs to cost. Roland Cifuentes leads every estimate with that inspect-first approach, and it’s why Ontario customers don’t get pushed into a premature teardown when a targeted repair would carry the roof another five years.
Our crews know the tract patterns in this city. We’ve worked homes off Euclid Avenue, through the older pockets near the historic core, and across the 91761 and 91764 subdivisions where the original roofs are now hitting the 25-to-35-year mark. That local familiarity means quicker diagnostics and fewer surprises on quote day. Ontario homeowners consistently tell us the same thing: they appreciated knowing exactly what we found on the decking before any money changed hands.
Styles & brands we work with
Flat Roof Replacement in Ontario
Flat Roof Replacement in Ontario is most common on the low-slope additions, carports, and patio covers attached to the city’s mid-century tract homes, as well as on some 1970s and 1980s commercial-to-residential conversions near the downtown core. A flat roof replacement here typically runs $8 to $14 per square foot installed, depending on membrane choice, insulation depth, and whether the existing decking can be salvaged. Ontario’s summer heat is brutal on flat roof membranes. The UV exposure and thermal cycling break down modified bitumen and single-ply seams faster than coastal climates, so material choice matters more than most people expect.
When the Decking Needs Upgrading
Flat roof tear-offs in Ontario often reveal decking that was never designed for modern membrane attachment. Older plywood or OSB that’s seen decades of heat and occasional ponding may delaminate at the edges. If that’s what we find, we write the new decking into the allowance before work starts, so the quote you approved is the quote you pay, unless you choose to approve a documented change.
Membrane and Drainage Choices
For Ontario’s heat load, we typically present membrane options with higher reflectivity or reinforced seams, especially for homes that get full afternoon sun off the 60 freeway corridor. Drainage is the other half of the fight in this city. A flat roof that holds water for 48 hours after a rare winter storm will fail years before one that sheds it, so re-sloping or adding crickets is sometimes the smarter fix than simply re-membraning.
Roof Installation in Ontario
Roof Installation in Ontario means full new-roof construction on additions, ADUs, and a steady stream of new builds going up in the city’s northern subdivisions. New construction roofing in Ontario typically runs $10,500 to $22,000 for a standard residential footprint, though the final number tracks square count, pitch, and code requirements specific to each permit package. Ontario’s building department enforces current Title 24 energy standards, which influence underlayment choices and ventilation design on new roofs, and we pull permits and pass those inspections before we call the job done.
New Construction Roofs
On a new build in Ontario, the roof package has to satisfy both the city inspector and the homeowner who’ll live under it for decades. We coordinate sheathing, underlayment, flashing, and shingle installation as one scope so the roof is ready for inspection on schedule. Our seven-brand lineup means a builder can spec GAF architectural shingles on one project and CertainTeed on the next, without switching contractors.
Roof Decking Replacement
Decking replacement is a frequent line item on Ontario teardowns, especially in homes built before the 1980s. The original 1×6 skip sheathing common in mid-century tracts doesn’t meet modern nailing-surface requirements for architectural shingles, and it can’t hold the high-wind nailing pattern that Santa Ana gusts demand. When we re-deck, we upgrade to code-compliant plywood or OSB, and we do it under the allowance, not as a mid-job surprise.
Trusted Brands We Service in Ontario
We carry GAF, CertainTeed, and Owens Corning among seven total brands, and we keep local stock available for Ontario jobs so a replacement doesn’t stall waiting on materials. The brand spread matters in this city because the right shingle for a 1960s stucco tract home near the historic core isn’t necessarily the right shingle for a 2005 subdivision off Archibald Avenue. We recommend by fit, not by inventory pressure, and every product we install carries its manufacturer’s material warranty.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Ontario Homes
- Blocked or non-existent soffit vents: Ontario’s mid-century tracts were built before modern roof-deck ventilation standards. We routinely find furred-out soffits and no ridge vent, meaning the decking has been cooking from below for decades, and a like-for-like shingle swap would just trap that heat all over again.
- Santa Ana wind damage at ridges and rake edges: Wind lifts architectural shingles at the edges, UV degrades the exposed sealant strips, and the next wind peels a larger field. A shingle-only repair that skips starter strip and ridge nailing just resets that clock.
- Skip sheathing and split rafters under old roofs: Tearing off a 1960s roof in Ontario often exposes original 1×6 skip sheathing, sometimes under three layers of shingles. Split rafters and daylight at valley penetrations are common finds, and they have to be addressed before any new roof goes on.
- Tile roofs with cracked pieces and brittle underlayment: Older Ontario tile roofs crack hairlines and slip tiles in wind, and the original 30-pound felt underneath is now brittle. The first rain drives water straight to the decking, and the leak shows up in the ceiling, not at the cracked tile.
Pricing for Roof Replacement in Ontario, CA
A typical asphalt shingle roof replacement in Ontario runs $12,000 to $18,000 for a 1,800 to 2,400 square foot home. Architectural shingle upgrades add $1,200 to $3,500 depending on brand and warranty tier. Flat roof sections run $8 to $14 per square foot. Decking replacement, when needed, adds $2 to $4 per square foot of affected decking area. The variables that move the number in Ontario are roof pitch, number of layers to tear off, decking condition, and whether the home needs ventilation upgrades to meet current code. We write every one of those variables into the contract as a priced allowance before we start, so you approve the number before we touch the roof. Call (866) 538-0713 for a free, itemized estimate. Estimates are free, and the quote you approve is the quote you pay, no change orders unless you sign off on them.
One thing Ontario homeowners should specifically ask about: mid-century teardown exposure. Ontario’s older tracts were built before modern roof-deck ventilation standards, so when we tear off a roof here we routinely find furred-out or blocked soffit vents and no ridge vent, meaning the same Santa Ana heat that cracks tiles is also cooking the decking from below, and a like-for-like shingle swap traps that heat again. We build the ventilation correction into the allowance so it doesn’t blindside you mid-job.
We tore off a 1960s asphalt roof on a stucco tract home near the historic downtown core and found the original 1×6 skip sheathing under three layers, with two rafters split and daylight at a valley penetration. We re-decked to code, ran ice and water shield through the valleys, set a ridge vent and clear soffit intake, and finished with GAF architectural shingles nailed to the high-wind pattern, priced and approved in writing before we laid a single square.
We Also Serve Cities Near Ontario
Our crews cover Ontario and the surrounding Inland Empire communities, including Montclair, Upland, Chino, and San Antonio Heights. If you’re in one of those cities and need an honest roof assessment, the same inspection-first process applies. Call (866) 538-0713 and we’ll get you on the schedule.
Serving Ontario, CA — Our Local Coverage Area
We’re based in the Ontario area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About Roof Replacement in Ontario
We’re checking for four things: rotted or delaminated decking, skip sheathing that won’t meet code, split or undersized rafters, and blocked or missing ventilation. In Ontario’s mid-century tracts, it’s common to find all four on the same roof, especially if the home has original 1×6 sheathing and no ridge vent. We document everything with photos before we quote, and any required decking repair goes into the written allowance so you know the number before we start.
Yes, we recommend ice and water shield in valley penetrations and around roof penetrations regardless of snow. Ontario’s winter storms, when they arrive, are short but intense, and wind-driven rain gets under shingles at valleys and flashing the same way snow melt would elsewhere. It’s a few hundred dollars on most roofs, and it stops the leak that shows up in your ceiling three months after the job is done. Call (866) 538-0713 for an exact quote.
Because the materials fail by different mechanisms. Tile cracks at the hairline and slips out of position, and the old felt underneath is brittle, so water goes straight through. Shingle roofs lose granules and lift at the ridge and rake edges first. We see both failure modes after every Santa Ana event in Ontario’s older tracts, and the repair or replacement path is different for each. An inspection tells you which one you’re actually dealing with.
Most Ontario homes between 1,800 and 2,400 square feet translate to 22 to 30 roofing squares, though it depends on pitch and overhangs. We measure every plane, not just the footprint, and the quote lists the exact square count, shingle bundle count, and waste factor so you can verify it against the invoice. Estimates are free, call (866) 538-0713 to get yours measured.
Yes, if it’s nailed to the high-wind pattern and the starter strip and ridge caps are done correctly. Ontario sits in a wind zone that requires a specific nailing schedule, and older roofs in this city frequently weren’t built to it. We nail every shingle to the high-wind pattern and run starter strip on every rake edge, which is exactly what the manufacturer’s warranty requires in this climate.
Need a straight answer about your Ontario roof? Call (866) 538-0713 to schedule a free inspection and replacement estimate. We’ll tell you what we find, show you the photos, and give you numbers you can actually plan around.
Written by Roland Cifuentes, Owner at Suncrest Roof Repair, serving Ontario from our base in Rancho Cucamonga.